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RARE EARTH ELEMENT-ADDED OPTICAL FIBER AND METHOD OF MANUFACTURING THE SAME, AND FIBER LASER 发明申请

2023-10-03 3820 66K 0

专利信息

申请日期 2025-07-10 申请号 JP2008064715
公开(公告)号 JP2009224405A 公开(公告)日 2009-10-01
公开国别 JP 申请人省市代码 全国
申请人 FUJIKURA LTD
简介 PROBLEM TO BE SOLVED : To provide a rare earth element-added optical fiber which can reduce an influence of photo darkening by controlling rare earth addition distribution and has high performance with low loss and high oscillation efficiency. SOLUTION : The rare earth element-added optical fiber is comprised of a core and a clad surrounding the same, and the core is added with rare earth elements. Assuming that electric field distribution at energizing wavelength is Pp(r), electric field distribution at wavelength of amplified spontaneous emission and/or stimulated emission guiding in the core is Ps(r) and rare earth element addition distribution is D(r) (mass% in unit), relationship of the formula (1) (where, r0 is the center of the core and rc is a core diameter) can be satisfied. COPYRIGHT : (C)2010, JPO&INPIT


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